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|Title:||Non-Fickian diffusion and the accumulation of methane bubbles in deep-water sediments|
|Authors:||Goldobin, Dennis S.|
Brilliantov, N. V.
Lovell, M. A.
Rochelle, C. A.
Jackson, P. D.
Haywood, A. M.
Hunter, S. J.
Rees, J. G.
|Publisher:||Springer Berlin Heidelberg|
|Citation:||The European Physical Journal E Soft Matter, 2014, 37 (5), p. 45|
|Abstract:||In the absence of fractures, methane bubbles in deep-water sediments can be immovably trapped within a porous matrix by surface tension. The dominant mechanism of transfer of gas mass therefore becomes the diffusion of gas molecules through porewater. The accurate description of this process requires non-Fickian diffusion to be accounted for, including both thermal diffusion and gravitational action. We evaluate the diffusive flux of aqueous methane considering non-Fickian diffusion and predict the existence of extensive bubble mass accumulation zones within deep-water sediments. The limitation on the hydrate deposit capacity is revealed; too weak deposits cannot reach the base of the hydrate stability zone and form any bubbly horizon.|
|Rights:||Copyright © 2014, EDP Sciences. This is an author produced manuscript of a paper published in The European Physical Journal E Soft Matter, 2014, 37 (5), p. 45. The final publication is available at Springer via http://dx.doi.org/10.1140/epje/i2014-14045-x|
|Appears in Collections:||Published Articles, Dept. of Mathematics|
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